Abstract We developed nanocrystalline powders with high Fe contents through methodological and compositional innovations. The Fe-Cr-Cu-Si-B-Sn powders exhibit high Bs of 1.55 T–1.60 T and core losses of 4800–8000 kW/m3 at 2 MHz under 30 mT, P0.2/3M. The Cu clusters provide a high number density of nucleation sites, leading to the formation of powders with nanocrystalline structures. It is found that high number density of Cu clusters are realized by distribution of sub-nanometer Sn clusters, especially near the surface. The addition of Sn enables the maintenance of a stable supply of nucleation sites regardless of powder diameters i.e., a wide variety of quenching rates is accepted.

中文翻译：

---

Fe基高Bs纳米晶合金粉末的研制

摘要 我们通过方法和成分创新开发了高铁含量的纳米晶粉末。Fe-Cr-Cu-Si-B-Sn 粉末表现出 1.55 T–1.60 T 的高 Bs 和 4800–8000 kW/m3 的磁芯损耗，在 30 mT、P0.2/3M、2 MHz 下。铜簇提供高数量密度的成核位点，导致形成具有纳米晶体结构的粉末。发现高数量密度的铜簇是通过亚纳米锡簇的分布实现的，尤其是在表面附近。无论粉末直径如何，添加 Sn 都能维持稳定的成核位点供应，即可以接受各种淬火速率。